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.Dd August 15, 2010
.Dt AG_EXECUTE 3
.Os
.ds vT Agar API Reference
.ds oS Agar 1.4.1
.Sh NAME
.Nm AG_Execute
.Nd agar file execution interface
.Sh SYNOPSIS
.Bd -literal
#include <agar/core.h>
.Ed
.Sh DESCRIPTION
The
.Fn AG_Execute
function provides a cross-platform interface for executing external
applications.
.Sh INTERFACE
.nr nS 1
.Ft "AG_ProcessID"
.Fn AG_Execute "const char *file" "char **argv"
.Pp
.Ft "AG_ProcessID"
.Fn AG_WaitOnProcess "AG_ProcessID pid" "enum ag_exec_wait_type wait_type"
.Pp
.Ft "int"
.Fn AG_Kill "AG_ProcessID pid"
.Pp
.nr nS 0
The
.Fn AG_Execute
function executes the specified file with the given arguments, returning an
integer process ID.
If an error has occurred, the function returns -1 with an error message.
.Pp
.Fn AG_WaitOnProcess
checks for status or waits until the specified process terminates.
The
.Fa wait_type
argument may be one of:
.Bl -tag -width "AG_EXEC_WAIT_IMMEDIATE "
.It AG_EXEC_WAIT_IMMEDIATE
If the process has not exited, return immediately without blocking.
.It AG_EXEC_WAIT_INFINITE
Block the calling thread until the process has exited.
.El
.Pp
The function returns the PID of the terminated process, -1 if an error
has occurred, or 0 if
.Fa wait_type
is
.Dv AG_EXEC_WAIT_IMMEDIATE
and the process is still running.
.Pp
The
.Fn AG_Kill
function immediately terminates the specified process.
.Sh SEE ALSO
.Xr AG_Intro 3
.Sh HISTORY
The
.Nm
interface first appeared in Agar 1.4.1.
